feat: add prefetch support to InvertedIndexFooterReader for reduced I/O time

[WenyXu]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

What's changed and what's your intention?

Add prefetch support to InvertedIndexFooterReader, and set the default prefetch size to 1KiB. To reduce the inefficiency of discrete small S3 IO operations.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR requires documentation updates.

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[codecov]

Codecov Report

Attention: Patch coverage is 98.68421% with 1 line in your changes missing coverage. Please review.

Project coverage is 83.80%. Comparing base (1a8e77a) to head (c14ab76).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5146      +/-   ##
==========================================
- Coverage   84.05%   83.80%   -0.25%     
==========================================
  Files        1169     1169              
  Lines      217737   217789      +52     
==========================================
- Hits       183015   182517     -498     
- Misses      34722    35272     +550     

[v0y4g3r]

Rest LGTM

[zhongzc]

LGTM